Snap-fastener.



G. A. HOLMES.

SNAP FASTENER,

APPLIOATION mam JULY 20, 1908.

91 8,325. Patented Apr. 13, 1909.

- UNITED snares Parana. oirFroE.

GEORGE A. HOLMES, OF NEWTON CENTER, MASSACHUSETTS, ASSIGKOB 'l'O "UNITED STA'] ES FASTENER COMPANY, OF BOSTON, MASSACHUSETTS, A CORPORATION OF v MAINE.

SNiAP-FASTENER.

Specification of Letters Patent. Application filed July 20,v 1908. Serial No. 444,315.

Patented April is, 1909.

Newton Center, in the countyol Middleser;

and State of Massachusetts, have invented new and useful Improvements in Snap-Fasteners, 01'' which the following is a specification.

My inventlon relates to snap tastenors and more particularly to that class of fasteners which are attached without previous pcrforation of the material'and commonly called self piercing fasteners. its object is to provide a strongand erlicient fastener of the kind described which may be quickly and easily secured to the material.

Referringto the drawings, which illustrate an embodiment of my invention, Figures 1 and 2 are respectivelysectional views of the upper and lower portions of a socket member, andFigs. 3 and 7 show said portions after they have been assembled. l igs. t and -5 are modifications of the upper 'portion of the socket member shown in Fig. 1, and Fig. 6 25 shows the. modified form of Fig. S'atter the parts of the fastener have been assembled.

A, is the upper section of a socket member comprising ,a female gripping and shearing piece a having an opening a A cap (L3 is clenched over said gripping and shearing piece.

B is the lower section of a socket member adapted to be seated on the opposite side of mater'ial and comprises a socket chamber F) having a ilange b and a male shearing and attaching projection 3) provided with an inset I). I

In securing the socketniember the unperforated material is placed between the parts A and B. When pressure is applied by suitable instruments, two resul ts follow. the material is forced by the projection t against the comparatively shaipedge .oi the opening a and is sheared so-that the projection b passes through the material into the opening a carrying with itthe small cut out portion of the material c .Lt the same time the edge of the opening a is brought into contact with the inset b. The continuation of pressure forces the piece a upward toward First the cap causing the edge of the opening (I firmly to grip the projection b at the msct b",

so that the parts A and B are securely iastencd together with the material between them as shown in Fig. 3.

Some materials upon which fasteners of this class are used have a 'tendency to draw away from the fastener, and with such material it is desirable that the fabric shall be very tightly held between the-parts A and :B. For materials of this kind the shearing and gripping piece a may be curved, as shown in Fig. at, or a collet C may be used to aid in gripping the material, as shown in Figs. 5

and 6.

he shearing edge of the female member is substantially flush with the loweredge, of said female member, so that shearing takes place in the plane of the material and prevents puckering. up into the cap before being sheared, puckering would result.

When the fastener is used upo thin ma terialwhich tends to pull away after the parts have been assembled, it is desirable to form the shearing )iece a as shown in Fig. 4-, or to employ a col etC as shown in Figs. 5 and 6.

What 1 claim and desire to secure by Lettcrs'P'atent is:-

1. A socket member of a snap fastener comprising'two parts,- One a male member provided with a,socket chamber and a male shearing piece at its top, the other a female member ada ted to be disposed on the opposite side 01 material and having a female shearing piece substantially flush with its lower edge, said male member adapted to cooperate with said female member to shear said material and to pass through said material into said female member and to be socurely gripped thereby.

Were the material first drawn .fiusfi with the lower edge of said female Signed by me at Best-0n, county of Sufiolk, gnembeq; said male member adapted to (:0- State of Massachusetts this sixth day of Operate ithleaid female-member to shear July 1908. w

said matel ielend to pa.' ss'ighrough said mate- I GEORGE A. HOLMES.

@ rjalfinte saido emng and to be securely Witnesses:

gripped by sai femaie member with the (HIARLEg I). NOODBERRY,

'redigigpf said opening leaked within said inset. l 'J0sE1 Hf1NE H. RYAN. 

